Re: [Cbor] Supporting IPv6 Link-Local with scope (was Re: Éric Vyncke's Discuss on draft-ietf-cbor-network-addresses-09: (with DISCUSS and COMMENT))

Michael Richardson <> Wed, 06 October 2021 16:19 UTC

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From: Michael Richardson <>
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Date: Wed, 06 Oct 2021 12:18:58 -0400
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Subject: Re: [Cbor] =?utf-8?q?Supporting_IPv6_Link-Local_with_scope_=28was_Re?= =?utf-8?q?=3A_=C3=89ric_Vyncke=27s_Discuss_on_draft-ietf-cbor-network-add?= =?utf-8?q?resses-09=3A_=28with_DISCUSS_and_COMMENT=29=29?=
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Hi, at the CBOR WG meeting this morning, support for IPv6 LL scopes
was the major topic.

We added an optional third parameter to the interface definition,
and made it valid to specify the interface prefix length as "false"

I hope that I got the CDDL right:


We also agreed to lowercase all HEX, and to leave Ethernet tags for Donald's
rfc7042bis.  (despite that being informational and a possible downref issue)

We agreed that Invalid CBOR is... invalid CBOR, and that the CDDL gives the
details for the limits.

I have posted a revision -10, which I hope satisfies all of the DISCUSS and

Michael Richardson <>   . o O ( IPv6 IøT consulting )
           Sandelman Software Works Inc, Ottawa and Worldwide